MariaEll,
For PPT 2003, WordArt includes a circular text function that will make text
run
around in a circle. Click on the WordArt icon in the Drawing toolbar (that
button with the slanted blue "A" on it), select a WordArt style (any style is
fine, but I recommend the third style from the left on the first line for
this example), and click OK. Then, select a font size, type in your text, and
click OK. Finally, from the WordArt toolbar, click on the WordArt shape icon,
select a circle, and presto! - your text goes around and around...
I don't know what options PowerPoint 2007 would give you if you're using
that, but anyway, for version up through 2003 (?), I think this will do what
you want it to (if I'm understanding you correctly ;-) ).
Jeff